Wake on LAN for ProLiant DL160 G6

Hi

I have been trying to get Wake on LAN to work with my ProLiant DL160 G6. I understand from the specifications that this product supports WOL but I do not have ILO on this server. I have enabled the setting in the BIOS under PCI Options, and then tried to send a magic packet from several different machines and nothing wakes the machine.

This server is going to be hidden away and only used occasionally, so I cannot justify the power costs of leaving it on 24/7, so WOL is really important to me.